TEE GENITAL ORGANS OF THE MALE. 



965 



selves like the arteries, and unite in a single trunk that enters the posterior vena 

 cava, near the renal veins. (On the cord, in addition to their sometimes varicose 

 condition, the spermatic veins have been observed to form a network, named 

 the pampiniform plexus.) 



The lymphatics are most numerous beneath the serous layer and the tunica 



Fig. 520. 



THE INTERNAL GENITO-URINARY ORGANS, WITH THE STOMACH, LIVER, AND SPLEEN, IN 

 THE F<ETUS OF A MARE 



R, Left kidney ; V, bladder ; T, testicle ; at, spermatic artery ; G, gubernaculum testis ; e, 

 epidiiiymis (the letter is placed in the centre of the serous layer which suspends the testicle and 

 spermatic vessels from the subiumbar resion, and after the descent of the gland, forms the 

 frtenum between the two layer.s in the vaginal sheath); E, stomach; F, liver; /. lobus Spigelii ; 

 P, vena portse ; C, umbilical cord ; 0, umbilical vein ; 0', intra-hepatic course of that vein, 

 indicated by a double dotted line. 



albuginea. They commence by lacunae in the interstitial connective tissue, and 

 form a very rich network, in the meshes of which are seminiferous tubules. They 

 pass into the network of the tunica albuginea, and thence they follow the sper- 

 matic cord to terminate in the sublumbar glands. 



The nerves of the testicle are derived from the sf athetic (and pass from 



